without the foreign students the system changes drastically. they pay more tuition per student, they make up for demographic trends of flat to down growth in number of potential students and they keep pressure on having live vs online courses as International students have to take the bulk of their credit hours in live courses. that last one alone is a big deal and many programs (grad in particular) have kept live/on campus classes to accommodate these students. get rid of them and we move even more online and the competitive landscape changes dramatically and all the investment in physical facilities comes into question.
it's only a matter of time for the traditional university system